Telecommunications chassis with slidable trays

ABSTRACT

A slide assembly for slidably coupling a telecommunications tray to a telecommunications chassis includes a rail configured for mounting to the chassis, the rail defining a rail sliding cavity flanked by a first detent adjacent a first end and a second detent adjacent a second end of the rail, the rail further comprising first and second chassis mounting features, the first and the second chassis mounting features are oriented with respect to each other such that if two of the same rails are aligned and brought together in a juxtaposed relationship with the first and second chassis mounting features facing each other, the first and the second chassis mounting features can nest relative to each other so as to not increase the total width of the two rails. A guide configured for mounting to the telecommunications tray defines a guide sliding cavity configured to slidably receive the rail such that the rail sliding cavity and the guide sliding cavity face each other, the guide defines a pin connected thereto via a flexible cantilever arm, at least a portion of the pin extending into the rail sliding cavity when the rail and the guide are in a sliding relationship for latching by the first and second detents of the rail in providing two predetermined stop positions for the guide.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No. 16/738,591, filed on Jan. 9, 2020, now U.S. Pat. No. 11,042,001; which is a continuation of U.S. patent application Ser. No. 16/094,744, filed on Oct. 18, 2018, now U.S. Pat. No. 10,539,757; which is a National Stage of PCT/US2017/027932, filed on Apr. 17, 2017; which claims the benefit of U.S. Patent Application Ser. No. 62/324,699, filed on Apr. 19, 2016, the disclosures of which are incorporated herein by reference in their entireties. To the extent appropriate, a claim of priority is made to each of the above disclosed applications.

TECHNICAL FIELD

The present disclosure relates generally to telecommunications equipment. More specifically, the present disclosure relates to equipment designed for high density applications such as telecommunications chassis.

BACKGROUND

In the telecommunications industry, the demand for added capacity is growing rapidly. This demand is being met in part by the increasing use and density of telecommunications equipment, specifically, fiber optic transmission equipment. Even though fiber optic equipment permits higher levels of transmission in the same or smaller footprint than traditional copper transmission equipment, the demand requires even higher levels of fiber density. This has led to the development of high-density fiber handling equipment.

Because of the large number of optical fibers passing into and out of fiber optic equipment such as high density fiber distribution frames, such frames normally incorporate a variety of structures to organize and manage the fibers. Such frames also include structures for facilitating access to the densely packed terminations. Drawer-based systems including slidable equipment-carrying trays are known.

Further developments in such systems are desired.

SUMMARY

The present disclosure relates to a telecommunications device in the form of a telecommunications frame or chassis. The telecommunications chassis is a drawer-based system with sliding trays for providing access to the equipment housed within the trays. According to one example embodiment, the telecommunications equipment housed within the trays may be fiber optic devices.

According to one aspect, the disclosure relates to a slide assembly for slidably coupling a telecommunications tray to a telecommunications chassis, the slide assembly comprising a tray rail configured for mounting to the telecommunications chassis, the tray rail defining a rail sliding cavity flanked by a first detent adjacent a first end and a second detent adjacent a second end of the tray rail, the tray rail further comprising a first chassis mounting feature and a second chassis mounting feature, wherein the first and the second chassis mounting features are oriented with respect to each other such that, if two of the same tray rails are aligned and brought together in a juxtaposed relationship with the first and second chassis mounting features facing each other, the first and the second chassis mounting features can nest relative to each other so as to not increase the total width of the two tray rails. The slide assembly further includes a tray guide configured for mounting to the telecommunications tray, the tray guide defining a guide sliding cavity configured to slidably receive the tray rail such that the rail sliding cavity and the guide sliding cavity face each other, the tray guide defining a pin connected thereto via a flexible cantilever arm, at least a portion of the pin extending into the rail sliding cavity when the tray rail and the tray guide are in a sliding relationship so as to be latched by the first and second detents of the tray rail in providing two predetermined stop positions for the tray guide.

According to another aspect, the disclosure relates to a telecommunications system comprising a telecommunications chassis and a telecommunications tray that supports telecommunications equipment slidably mounted to the telecommunications chassis between a stored position and an extended position, wherein the telecommunications tray is mounted to the telecommunications chassis via a slide assembly. The slide assembly further comprises a tray rail mounted to the telecommunications chassis, the tray rail defining a rail sliding cavity flanked by a first detent adjacent a first end and a second detent adjacent a second end of the tray rail, the tray rail further comprising a first chassis mounting feature and a second chassis mounting feature, wherein the first and the second chassis mounting features are oriented with respect to each other such that, if two of the same tray rails are aligned and brought together in a juxtaposed relationship with the first and second chassis mounting features facing each other, the first and the second chassis mounting features can nest relative to each other so as to not increase the total width of the two tray rails. The slide assembly further includes a tray guide mounted to the telecommunications tray, the tray guide defining a guide sliding cavity that slidably receives the tray rail such that the rail sliding cavity and the guide sliding cavity face each other, the tray guide defining a pin connected thereto via a flexible cantilever arm, at least a portion of the pin extending into the rail sliding cavity when the tray rail and the tray guide are in a sliding relationship so as to be latched by the first and second detents of the tray rail in providing the stored and the extended positions of the telecommunications tray.

According to yet another aspect, the disclosure is related to a telecommunications system comprising a telecommunications chassis defining a right wall, a left wall, and a center wall and a pair of telecommunications trays each supporting telecommunications equipment slidably mounted in a side-by-side horizontally stacked relationship to the telecommunications chassis between a stored position and an extended position, wherein each telecommunications tray is mounted to the telecommunications chassis via a slide assembly. The slide assembly further comprises a tray rail configured for mounting to the telecommunications chassis, the tray rail defining a rail sliding cavity flanked by a first detent adjacent a first end and a second detent adjacent a second end of the tray rail, the tray rail further comprising a first chassis mounting feature and a second chassis mounting feature, wherein the first and the second chassis mounting features are oriented with respect to each other such that, if two of the same tray rails are aligned and brought together in a juxtaposed relationship with the first and second chassis mounting features facing each other, the first and the second chassis mounting features can nest relative to each other so as to not increase the total width of the two tray rails. The slide assembly further includes a tray guide configured for mounting to the telecommunications tray, the tray guide defining a guide sliding cavity that slidably receives the tray rail such that the rail sliding cavity and the guide sliding cavity face each other, the tray guide defining a pin connected thereto via a flexible cantilever arm, at least a portion of the pin extending into the rail sliding cavity when the tray rail and the tray guide are in a sliding relationship so as to be latched by the first and second detents of the tray rail in providing the stored and the extended positions of the telecommunications tray. A tray rail of the slide assembly is mounted to each of the right and left walls of the telecommunications chassis and two of the same tray rails are mounted facing each other to the center wall of the telecommunications chassis so as to capture the center wall thereinbetween.

According to yet another aspect, the disclosure is related to a telecommunications tray for supporting telecommunications equipment, the telecommunications tray comprising a right wall and a left wall. Each of the right and the left walls include mounted thereon a tray guide of a slide assembly, the tray guide defining a sliding cavity that is configured to slidably receive a tray rail mounted to a telecommunications fixture. The tray guide defines a pin connected thereto via a flexible cantilever arm, at least a portion of the pin extending into the sliding cavity such that when the tray rail and the tray guide are in a sliding relationship, the pin is configured to be temporarily latched by portions of the tray rail, wherein the tray guide defines a latch slidably coupled to a first opening defined on each of the right and left walls of the telecommunications tray and an alignment rim surrounding an aperture defined around the pin that aligns with and mates with a second opening defined on each of the right and left walls of the telecommunications tray.

A variety of additional inventive aspects will be set forth in the description that follows. The inventive aspects can relate to individual features and combinations of features. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the broad inventive concepts upon which the embodiments disclosed herein are based.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the outer side of a tray rail of an inventive slide assembly of the present disclosure;

FIG. 2 is a perspective view showing the inner side of the tray rail of FIG. 1 ;

FIG. 3 is a perspective view showing the outer side of a tray guide of the inventive slide assembly of the present disclosure, the tray guide configured to mate with the tray rail of FIGS. 1-2 in forming the inventive slide assembly of the present disclosure;

FIG. 4 is a perspective view showing the inner side of the tray guide of FIG. 3 ;

FIG. 5 illustrates the tray rail of FIGS. 1-2 nested within the tray guide of FIGS. 3-4 , the slide assembly shown in a stored position;

FIG. 6 illustrates the slide assembly of FIG. 5 in an extended position, wherein the tray guide has been moved and interlocked with respect to the tray rail in a forward position;

FIG. 7 illustrates an example telecommunications tray configured for mounting to a telecommunications fixture in the form of a chassis or frame using the slide assembly of FIGS. 1-6 , the tray illustrated with the tray guides of the slide assembly mounted thereon;

FIG. 8 illustrates the tray of FIG. 7 populated with telecommunications equipment in the form of fiber optic cassettes and mounted to a telecommunications chassis, the left wall of the chassis also being used to illustrate how two similar tray rails of the present disclosure can cooperate and nest together when they share and are mounted on both sides of a chassis wall such as a center wall separating two side-by-side slidable trays;

FIG. 9 illustrates the two nestable tray rails of FIG. 8 in isolation removed from the chassis;

FIG. 10 illustrates the tray of FIG. 8 in an extended position, wherein one of the fiber optic cassettes is also shown exploded off the tray;

FIG. 11 illustrates the tray of FIG. 10 populated with telecommunications equipment in the form of fiber optic adapter blocks instead of fiber optic cassettes;

FIG. 12 is a partially exploded view of a door assembly that includes an inventive hinge assembly according to the present disclosure, the hinge assembly configured for mounting the door to a telecommunications fixture similar to the chassis shown in FIGS. 8, 10, and 11 ;

FIG. 13 illustrates two of the door assemblies shown in FIG. 12 in a fully assembled configuration, the door assemblies used on a chassis similar to that shown in FIG. 12 but including two levels for supporting slidable trays;

FIG. 14 illustrates the upper door of FIG. 13 in a partially open position;

FIG. 15 illustrates the upper door of FIG. 14 in a fully open position;

FIG. 16 illustrates the side view of a chassis similar to that shown in FIGS. 13-15 but including four levels for supporting slidable trays, one of the four doors of the chassis shown in a fully open position;

FIG. 17 illustrates a perspective view of another example of a telecommunications fixture in the form of a chassis similar to the chassis shown in FIGS. 8, 10, and 11-16 , the chassis shown with one of the trays thereof in a stored position and one in an extended position, with the door of the chassis in a fully open position allowing extension of the sliding tray;

FIG. 18 is a side view of the chassis of FIG. 17 ;

FIG. 19 is a front, top, left side perspective view of a hinge structure of the hinge assembly shown in FIGS. 12-18 , the hinge structure shown in isolation;

FIG. 20 is a front, top, right side perspective view of the hinge structure of FIG. 19 ;

FIG. 21 is a side view of the hinge structure of FIG. 19 ;

FIG. 22 is a top view of the hinge structure of FIG. 19 ;

FIG. 23 is front view of the hinge structure of FIG. 19 ;

FIG. 24 illustrates a front, right side perspective view of a pair of door assemblies, each including another example of an inventive hinge assembly according to the present disclosure, the hinge assembly configured for mounting the door to a telecommunications fixture similar to the chassis shown in FIGS. 8, 10, and 11-18 , wherein the upper door is shown in a fully open position;

FIG. 25 illustrates the door assemblies of FIG. 24 from a front, left side perspective view; and

FIG. 26 illustrates the door assemblies of FIGS. 24-25 from a right side view.

DETAILED DESCRIPTION

Reference will now be made in detail to examples of inventive aspects of the present disclosure which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Referring now to FIGS. 1-6 , a slide assembly 10 having features that are examples of inventive aspects in accordance with the present disclosure is illustrated. The slide assembly 10 is configured for use in a telecommunications fixture such as a chassis or frame for forming a drawer-based system with sliding trays for providing access to the equipment housed within the trays.

Examples of telecommunications chassis and trays that can utilize the slide assembly are illustrated, for example, in FIGS. 7, 8, 10, 11-18, and 24-26 of the present application, further details of which will be discussed hereinafter.

Still referring to FIGS. 1-6 , the slide assembly 10 is comprised of a tray rail 12 and a tray guide 14 that slidably cooperates with the tray rail 12. The tray rail portion 12 of the slide assembly 10 is configured to be mounted to the telecommunications fixture (e.g., a chassis/frame) and the tray guide portion 14 is configured to be mounted to the equipment trays. The slidable cooperation of the tray rail 12 and the tray guide 14 provide movement to the trays between stored and extended positions as will be discussed.

It should be noted that, unless otherwise specified, for ease of description and illustration, only one slide assembly 10 that can be used on one side of a chassis or a tray will be described herein with the understanding that all of the features discussed are applicable to the opposing side enabling slidable movement of the entire tray.

FIG. 1 illustrates a perspective view showing the outer side 16 of the tray rail 12, and FIG. 2 illustrates a perspective view showing the inner side 18 of the tray rail 12. As illustrated, for example, in FIGS. 10-11 , the outer side 16 of each tray rail 12 is configured for mounting to an interior face of a chassis wall.

As shown in FIG. 1 , on the outer side 16, each tray rail 12 includes a latch 20 and a latch pocket 22 adjacent a front end 24 and a latch 20 and a latch pocket 22 adjacent the rear end 26 of the rail 12. The tray rail 12 also defines a locking tab 28 toward the front end 24 and a locking tab 28 toward the rear end 26 thereof. The latches 20, the latch pockets 22, and the locking tabs 28 are all configured for mounting the tray rail 12 to a chassis wall, wherein these structures cooperate with intermating structures provided on the chassis wall for mounting the tray rail 12.

As shown, the latches 20 and the latch pockets 22 on the front and rear ends 24, 26 of the tray rail 12 are positioned in opposite orientations. The locking tabs 28 are also provided in an opposite diagonal orientation, wherein the front locking tab 28 is closer to an upper edge 30 of the rail 12 and the rear locking tab 28 is closer to a lower edge 32 of the tray rail 12. This opposing configuration of the latches 20, the latch pockets 22, and the locking tabs 28 allows two similar tray rails 12 to be mounted in a juxtaposed relationship with a chassis wall (e.g., a center chassis wall) captured thereinbetween. As shown in FIG. 9 , when the outer sides 16 of two similar tray rails 12 are brought together, the latches 20 at the front end 24 can nest within aligned respective latch pockets 22, and the latches 20 at the rear end 26 can nest within aligned respective latch pockets 22. As noted above, a similar feature is provided for the locking tabs 28. When the outer sides 16 of two similar tray rails 12 are brought together, the locking tabs 28 of the tray rails 12 align in a nested overlapping or vertically stacked configuration without abutting each other.

An example of a telecommunications fixture in the form of a chassis 34 is shown in FIGS. 10-11 with the tray rail 12 mounted to each of the right and left walls 36, 38 of the chassis 34. As illustrated by the left wall 38 of the chassis 34, each wall 36, 38 defines a pair of parallel openings 40 adjacent a rear end 42 and a pair of parallel openings 40 adjacent a front end 44. One of the openings 40 of each pair is configured to receive a latch 20 and the other of the openings 40 of the pair is configured to align with a latch pocket 22 provided at the front and rear ends 24, 26 of the tray rail 12 as shown in FIGS. 10-11 .

Still referring to FIGS. 10-11 , the latches 20 are slidably inserted into their respective openings 40, and, as depicted, a rearward movement of the tray rails 12 brings both the front and rear locking tabs 28 into alignment with tab openings 46 provided on the chassis walls 36, 38 to lock the tray rails 12 into place.

As discussed above, the tab openings 46 provided on the chassis walls 36, 38 are sized large enough to be able to accommodate two locking tabs 28 each in a vertically stacked arrangement to be able to allow a wall 36, 38 of the chassis 34 to be used as a center wall that separates two horizontal trays 48.

As illustrated in FIGS. 8 and 9 , the configuration of the tray rails 12 (and the intermating structures of the chassis walls 36, 38) allow the use of the same rails 12 to be used on both sides of a chassis wall 36, 38, allowing a chassis wall 36, 38 to be used as a shared center wall that can separate two side-by-side slidable trays 48. The tab openings 46 are sized to accommodate two locking tabs 28 in a vertically stacked arrangement. And, the front and rear latches 20 of one of the tray rails 12 can nest within the front and rear latch pockets 22 of a juxtaposed tray rail 12 through the openings 40 provided on the chassis wall 36, 38, allowing a single chassis wall to be used as a shared center wall.

Referring now to the inner side 18 of each tray rail 12, as shown in FIG. 2 , on the inner side 18, a sliding cavity 50 is provided that defines a detent 52 adjacent the rear end 26 of the tray rail 12 and a detent 52 adjacent the front end 24 of the tray rail 12. As will be discussed in further detail below, the front and rear detents 52 are configured to cooperate with a pin 54 provided on the tray guide 14 of the slide assembly 10 for fixing (at least temporarily) the trays 48 at stored and extended positions relative to the chassis 34 as noted above.

Still referring to FIG. 2 , the sliding cavity 50 defines an open end 56 at the front end 24 of the tray rail 12 for initially receiving the pin 54 of the tray guide 14 when slidably placing the tray 48 within the chassis 34. The front end 24 of the tray rail 12 also defines a tapered portion 58 to act as a lead-in end to facilitate the relative insertion of the tray rail 12 into the tray guide 14 as will be discussed in further detail below.

Still referring to FIG. 2 , as the pin 54 of the tray guide 14 is initially inserted into the sliding cavity 50, the pin 54 elastically deflects and clears a stop structure 60, a portion of which is located within the cavity 50. The stop structure 60 defines a tapered configuration to facilitate the insertion of the pin 54 into the cavity 50. After the pin 54 has cleared the stop structure 60 and is within the cavity 50, an end 62 of the stop structure 60 that is at least partially positioned within the cavity 50 is configured to abut and provide a positive stop for the pin 54 during extension of the tray 48. In FIG. 8 , the tray 48 is shown in the stored position, with the pin 54 of the tray guide 14 latched to the rear detent 52 of the tray rail 12. In FIGS. 10-11 , the tray 48 is shown in the extended position, with the pin 54 of the tray guide 14 latched to the front detent 52 of the tray rail 12. From the fixed (either stored or extended) positions, a force that overcomes the biasing force applied by the flexible detents 52 to the pin 54 has to be overcome in order to move the tray 48.

Referring now to the tray guide 14, the details thereof are illustrated in FIGS. 3-4 . FIG. 3 is a perspective view showing the outer side 64 of a tray guide 14, and FIG. 4 is a perspective view showing the inner side 66 of the tray guide 14.

The outer side 64 of the tray guide 14 is configured to cooperate with the tray rail 12 of the slide assembly 10. The inner side 66 of the tray guide 14 is configured for latching to a wall 68 of one of the sliding equipment trays 48.

The outer side 64, as shown in FIG. 3 , defines a sliding cavity 70 for slidably receiving the tray rail 12. The sliding cavity 70 defines an open end 72 for initially receiving the tapered lead-in front end 24 of the tray rail 12 and also a closed end 74 defining a stop for limiting further sliding movement of the tray rail 12 within the sliding cavity 70 of the tray guide 14.

As shown in FIG. 3 , the pin 54 of the tray guide 14 is positioned within and has at least a portion protruding into the sliding cavity 70 and, as discussed above, rides within the sliding cavity 50 of the tray rail 12 when the rail 12 and the guide 14 are in a sliding relationship. In FIG. 5 , the tray rail 12 is shown within the sliding cavity 70 of the tray guide 14, wherein the slide assembly 10 is shown in a stored position with the pin 54 of the tray guide 14 captured within the rear detent 52 of the tray rail 12. In FIG. 6 , the slide assembly 10 is shown in an extended position with the pin 54 of the tray guide 14 captured within the front detent 52 of the tray rail 12.

The stored position of the slide assembly 10 of FIG. 5 is also illustrated in FIG. 8 in the context of a chassis/tray system. And, the extended position of the slide assembly 10 of FIG. 6 is also illustrated in the context of a chassis/tray system in FIGS. 10-11 .

Now, referring back to FIG. 3 , the pin 54 is connected to the tray guide via a flexible cantilever arm 76. In order to completely remove the tray guide 14 from the tray rail 12 and completely remove an equipment tray 48 from the chassis 34, the flexible arm 76 has to be pushed or pried in a direction from the outer side 64 of the tray guide 14 toward the inner side 66 thereof to clear the stop structure 60 provided on the tray rail 12.

Referring now to FIG. 4 , the inner side 66 of the tray guide 14 is illustrated. The inner side 66 forms the tray-mount side of the tray guide 14, whereas the outer side 64 cooperates with the tray rail 12 in providing the slidable motion for the tray 48. The inner side 66 defines an alignment rim 78 that surrounds an aperture 80 for accessing the cantilever arm 76. The alignment rim 78 is generally positioned toward a rear end 82 of the tray guide 14. The inner side 66 also defines a latch 84 that is positioned generally toward the center of the tray guide 14. As shown in FIGS. 7, 8, 10, and 11 , the latch 84 is slidably inserted into an opening 86 defined on a tray wall 68 until the alignment rim 78 aligns with and snaps into a larger opening 88 provided on the tray wall 68 in latching the tray guide 14 to a tray 48.

As shown in FIGS. 3, 4, 7, 8, 10, and 11 , the tray guide 14 includes a flange 90 defining a mounting hole 92 for receiving a fastener for further securing the tray guide 14 to a tray wall 68. The rear end 82 of the tray guide 14 also defines a wraparound latch 94 that covers a rear edge 96 of the tray wall 68 and acts as an edge protector for any fibers leading toward the back of the chassis 34 during slidable movement of the tray 48.

As noted previously, the slide assembly 10 may be used to provide a drawer-based system allowing equipment carrying trays 48 to be accessed by sliding the trays 48 relative to a telecommunications fixture such as a chassis or frame. An example of such a chassis/tray system that has been referred to above in describing the features of the inventive slide assembly is illustrated in FIGS. 7, 8, 10, and 11 . As noted above, although need not be, such systems may be fiber optic systems and may house equipment forming fiber termination points or connection locations that need to be accessed by the pull-out trays 48.

In the embodiment of the system illustrated in FIGS. 8 and 10 , the tray 48, which is shown empty in FIG. 7 , is shown as populated with telecommunications equipment in the form of fiber optic cassettes 98 and mounted to a telecommunications fixture in the form of a chassis 34. In FIG. 8 , the left wall 38 of the particular chassis 34 is being used to illustrate the possible nesting of two similar tray rails 12 if the left wall 38 were to be used as a center wall separating two side-by-side slidable trays 48. In the embodiment of the system illustrated in FIG. 11 , the tray 48 is shown as populated with telecommunications equipment in the form of fiber optic adapter blocks 99 instead of fiber optic cassettes 98.

The illustrated telecommunications systems including the fiber optic systems including the pull-out trays 48 and chassis 34 shown in FIGS. 7, 8, 10, and 11 are simply example embodiments that can be used with the inventive slide assembly 10 described herein and are used to illustrate the inventive features thereof, with the understanding that the inventive features of the slide assembly 10 may be utilized on other specific or other types of drawer-based systems.

Referring now to FIGS. 12-23 , a door assembly 100 for use on a telecommunications fixture such as a chassis similar to chassis 34 of FIGS. 8, 10, and 11 is illustrated. The door assembly 100 includes a door 102 that is configured to be mounted to a front end of a chassis and a hinge assembly 104 used in mounting the door 102. The hinge assembly 104 allows the door 102 to be pivotally moved between a closed position and a fully open position. The door 102 includes a spring-loaded latch 106 for keeping the door 102 in the closed position. An example embodiment of the latch 106 is illustrated in FIGS. 12-18 , with the understanding that other various latch designs may be utilized.

It should also be noted that, unless otherwise specified, for ease of description and illustration, the door assembly 100 and the hinge assembly 104 will be described with respect to only one side thereof and with respect to only one side of a chassis with the understanding that all of the features discussed are applicable to the opposing side enabling opening and closing of the door 102.

Referring now specifically to FIG. 12 , the door 102 of the door assembly 100 defines a door pivot pin 108. As shown, the door pivot pin 108 is spaced apart from a front face 110 of the door 102, the reason for which will be described in further detail below.

Still referring to FIG. 12 , each of the right and left walls of the chassis 34 (only the left wall illustrated for simplicity) includes a hinge pivot pin 112 and a hinge stop pin 114.

A hinge structure 116 of the hinge assembly 104 provides the pivotal connection between the door 102 and the chassis 34. The hinge structure 116 defines a first pin receiver 118 adjacent a front end 120 for receiving the door pivot pin 108. The hinge structure 116 defines a second pin receiver 122 toward a center portion 124 of the hinge structure 116, spaced apart from the first pin receiver 118, for receiving the hinge pivot pin 112 of the chassis 34. The hinge structure 116 further defines a hinge limit slot 126 adjacent a rear end 128 thereof, spaced apart from the second pin receiver 122. The hinge limit slot 126 is configured to receive the hinge stop pin 114 of the chassis 34. The hinge structure 116 is shown in isolation in FIGS. 19-23 .

After the hinge structure 116 has been mounted so as to provide a connection between the door 102 and the chassis 34, a fastener 130 is removably mounted to the hinge pivot pin 112. The fastener 130 allows pivotal motion of the hinge structure 116 while keeping the hinge structure 116 coupled to the chassis 34. The door 102, via the door pivot pins 108, are captured against the chassis 34 by the hinge structures 116 at the right and left walls of the chassis 34.

The door assembly 100 and the hinge assembly 104 are configured such that the hinge structure 116 provides two pivot points for the door. The interaction of the door pivot pin 108 and the first pin receiver 118 allows a first pivoting motion for the door 102, wherein the door 102 is pivoted with respect to the hinge structure 116. The interaction of the hinge pivot pin 112 and the second pin receiver 122 allows a second pivoting motion for the door 102, wherein the hinge structure 116, itself, and the door 102 are both pivoted with respect to the chassis 34.

Now referring to FIGS. 12-16 , regarding the first pivoting motion for the door 102, the position of the door pivot pin 108 being spaced forward of the front face 110 of the door 102 allows the door 102 to be spaced forward enough to clear a door 102 therebelow when in a fully open position. This is shown in the side view in FIG. 16 . When the door 102 is open 180 degrees, due to the forward position of the door pivot pin 108, the door 102 is spaced far enough forward to clear and be in front of the door 102 therebelow. Still referring to FIGS. 12-16 , regarding the second pivoting motion for the door 102, given that the hinge structure 116 is also able to pivot with respect to the chassis 34, provides further movement to the pivot point established by the door pivot pin 108 of the door 102 and the first pin receiver 118 of the hinge structure 116. Such further travel allows the door 102 to be positioned below a horizontal plane PH defined by a bottom wall 132 of that level of the chassis 34. As such, the door 102, when fully opened, does not interfere with the slidable extension of the tray 48 at its respective level on the chassis 34. And, as noted above, when fully opened, is positioned far enough forward so as to clear the door assembly 100 (including the latch 106 of the door 102) and the hinge assembly 104 therebelow.

As shown in FIGS. 12-16 , the hinge structure 116 defines a lower arch 134 at a bottom portion 136 thereof for allowing the hinge structure 116 to clear the door 102 below when the door 102 is in the fully open position. The accommodation by the arch 134 of a door 102 therebelow is shown in detail in FIG. 16 .

As shown in FIGS. 12-16 , the interaction of the hinge stop pin 114 and the hinge limit slot 126 provides positive stops for the movement of the hinge structure 116 during its pivoting motion so as to limit the travel of the hinge structure 116. The size and shape of the hinge limit slot 126 is configured to provide positive stops at the desired closed and open positions for the door 102, as illustrated in FIG. 16 . According to certain embodiments, during the opening of the door 102, if the hinge structure 116 is pivoted first, the hinge limit slot 126 provides a stop for the hinge stop pin 114 when the door 102 has been opened about 35 degrees from a vertical plane Pv. This position is shown in FIG. 14 . Once the hinge stop pin 114 has contacted a lower end 138 of the hinge limit slot 126, the door 102 can now be pivoted with respect to the hinge structure 116 to allow the door 102 to open past the 35-degree angle to the fully opened position, which is shown in FIGS. 15-16 .

The hinge structure 116 also defines a hinge wall 140 that is configured to be contacted by the door 102 during the pivotal closing motion of the door 102. In moving the door 102 to the closed position, after the door 102 goes through its initial first pivoting motion, the door 102 contacts the hinge wall 140 to start moving the hinge structure 116 for the second pivoting motion. The interaction between the door 102 and the hinge wall 140 allows a technician to bring both the door 102 and the hinge structure 116 to their original positions with a single smooth motion.

As noted above, once the door 102 is brought to its closed position, the door 102 is latched to the chassis 34 via the spring-loaded latch 106. When the door 102 is in the closed position, the door 102 rests against the hinge wall 140.

Still referring to FIGS. 12-16 , it should be noted that a rear portion 142 of the hinge structure 116 defines a smooth arched profile at an upper end 144 thereof. The smooth profile of the upper arch 144 provides edge protection to any fibers that may be in the area during tray extension.

In FIGS. 17-18 , the door assembly 100 and the hinge assembly 104 are shown as being used on an embodiment of a telecommunications chassis 146 that includes features such as the slidable trays 48 discussed above. In FIGS. 17-18 , the depicted chassis 146 is shown with one of the trays 48 thereof in a stored position and one in an extended position, with the door 102 of the chassis 146 in a fully open position allowing extension of the sliding tray 48.

Now referring to FIGS. 24-26 , a door assembly 200 including another example of an inventive hinge assembly 204 according to the present disclosure is illustrated. FIG. 24 illustrates the door assembly 200 from a front, right side perspective view. FIG. 25 illustrates the door assembly 200 from a front, left side perspective view. And, FIG. 26 illustrates the door assembly 200 from a side view.

A majority of the configuration and functionality of the door assembly 100 of FIGS. 12-23 is shared by the door assembly 200 of FIGS. 24-26 . Similar to the door assembly 100 of FIGS. 12-13 , the door 202 of the door assembly 200 of FIGS. 24-26 also goes through multiple pivoting motions when being moved between the open and closed positions due to a similar combination hinge structure 216.

The hinge assembly 204 of FIGS. 24-26 is similar in structure and function to the hinge assembly 104 of FIGS. 12-23 described above except for a few differences. For example, as shown, the hinge structure 216 of the hinge assembly 204 of FIGS. 24-26 includes a spring-loaded pull-pin 214 that has to be pulled out and cleared from a pin opening 226 provided on the chassis before the hinge structure 216 can be pivoted. The pull-pin 214 and the pin opening 226 provide a variation on the hinge stop pin 114 and the hinge limit slot 126 features of the door assembly 100 of FIGS. 12-23 . Whereas the hinge stop pin 114 and the hinge limit slot 126 features of the door assembly 100 of FIGS. 12-23 are in full interaction throughout the entire travel motion of the hinge structure 116 and limit the travel path of the hinge structure 116, the pull-pin 214 is simply used to unlatch the hinge structure 216 to provide for a further pivoting action for the hinge structure 216 in fully extending a tray out of the chassis in the embodiment of the door assembly 200 of FIGS. 24-26 .

Similar to that provided by the hinge assembly 104 of FIGS. 12-23 , if a piece of equipment inside the chassis needs to be accessed without necessarily removing a tray therefrom, the door 202 can simply be opened without the need for the further pivotal action of the hinge structure 216.

In the embodiment of the door assembly 200 of FIGS. 24-26 , if the hinge structure 216 has been pivoted and the door 202 has been fully opened, then, when the door 202 is brought from the open position to the closed position, the pull-pin 214 has to be pulled out until the pin 214 is positioned in the pin opening 226 before the hinge structure 216, thus, the door 202, can be brought to the fully closed position.

Although in the foregoing description, terms such as “top,” “bottom,” “front,” “back,” “right,” “left,” “upper,” and “lower” were used for ease of description and illustration, no restriction is intended by such use of the terms. The telecommunications devices described herein can be used in any orientation, depending upon the desired application.

Having described the preferred aspects and embodiments of the present disclosure, modifications and equivalents of the disclosed concepts may readily occur to one skilled in the art. However, it is intended that such modifications and equivalents be included within the scope of the claims which are appended hereto. 

The invention claimed is:
 1. A telecommunications system comprising: a telecommunications chassis configured to slidably receive a telecommunications tray that supports telecommunications equipment, wherein the telecommunications chassis includes at least part of a slide assembly for receiving the telecommunications tray, the slide assembly comprising: a tray rail mounted to the telecommunications chassis, the tray rail defining a rail sliding cavity flanked by a first detent adjacent a first end and a second detent adjacent a second end of the tray rail, the tray rail further comprising a first chassis mounting feature and a second chassis mounting feature, wherein the first and the second chassis mounting features are oriented with respect to each other such that, if two of the same tray rails are aligned and brought together in a juxtaposed relationship with the first and second chassis mounting features facing each other, the first and the second chassis mounting features can nest relative to each other so as to not increase the total width of the two tray rails.
 2. The telecommunications system of claim 1, wherein the telecommunications chassis is configured to receive a plurality of the telecommunications trays in a vertically stacked relationship.
 3. The telecommunications system of claim 1, wherein the telecommunications chassis is configured to receive at least two of the telecommunications trays in a side-by-side horizontally stacked relationship with two of the same tray rails mounted facing each other so as to capture a center wall of the chassis thereinbetween.
 4. The telecommunications system of claim 1, wherein the first and second chassis mounting features are defined by tabs protruding from a face of the tray rail.
 5. The telecommunications system of claim 1, wherein each of the first and second chassis mounting features is defined by a latch and an adjacent latch opening, wherein the orientation of the latch and the latch opening of the first chassis mounting feature is reversed with respect to the orientation of the latch and latch opening of the second chassis mounting feature.
 6. The telecommunications system of claim 5, wherein the latch defined by the first chassis mounting feature is configured to align with and fit within the latch opening defined by the second chassis mounting feature when two of the same tray rails are aligned and brought together in a juxtaposed relationship with the first and second chassis mounting features facing each other.
 7. The telecommunications system of claim 1, wherein the tray rail defines a stop feature configured for limiting further sliding movement of a telecommunications tray that has been mounted to the telecommunications chassis, wherein the stop feature is defined by a protrusion at least partially extending into the rail sliding cavity.
 8. A telecommunications system comprising: a telecommunications chassis defining a right wall, a left wall, and a center wall, the telecommunications chassis configured to slidably receive a pair of telecommunications trays mounted in a side-by-side horizontally stacked relationship to the telecommunications chassis, wherein the telecommunications chassis includes at least part of a slide assembly for receiving each of the telecommunications trays, the slide assembly comprising: a tray rail configured for mounting to the telecommunications chassis, the tray rail defining a rail sliding cavity flanked by a first detent adjacent a first end and a second detent adjacent a second end of the tray rail, the tray rail further comprising a first chassis mounting feature and a second chassis mounting feature, wherein the first and the second chassis mounting features are oriented with respect to each other such that if two of the same tray rails are aligned and brought together in a juxtaposed relationship with the first and second chassis mounting features facing each other, the first and the second chassis mounting features can nest relative to each other so as to not increase the total width of the two tray rails, wherein a tray rail of the slide assembly is mounted to each of the right and left walls of the telecommunications chassis and two of the same tray rails are mounted facing each other to the center wall of the telecommunications chassis so as to capture the center wall thereinbetween.
 9. The telecommunications system of claim 8, wherein the first and second chassis mounting features are defined by tabs protruding from a face of the tray rail.
 10. The telecommunications system of claim 8, wherein each of the first and second chassis mounting features is defined by a latch and an adjacent latch opening, wherein the orientation of the latch and the latch opening of the first chassis mounting feature is reversed with respect to the orientation of the latch and latch opening of the second chassis mounting feature.
 11. The telecommunications system of claim 10, wherein the latch defined by the first chassis mounting feature is configured to align with and fit within the latch opening defined by the second chassis mounting feature when two of the same tray rails are aligned and brought together in a juxtaposed relationship with the first and second chassis mounting features facing each other.
 12. The telecommunications system of claim 8, wherein the tray rail defines a stop feature configured for limiting further sliding movement of the telecommunications trays that have been mounted to the telecommunications chassis, wherein the stop feature is defined by a protrusion at least partially extending into the rail sliding cavity. 